LCD screen

LCD screen

A laptop screen also known as LCD screen displays an image generated by the laptop video card. The LCD screen receives data signal from the video card through the LCD cable.

Laptop screens come in many different sizes and resolutions. In order to find the LCD screen size (in inches), you’ll have to measure the screen between the two diagonal corners.

Older laptops had mostly full screen LCD displays. Newer laptops have mostly widescreen LCD displays.

A backlight lamp (also known as CCFL bulb) is the main source of light in any LCD screen. The backlight lamp powers up by the inverter board.

lcd-screen-size

The laptop screen mounts inside the laptop display panel between the screen bezel and display cover. The screen is attached to the screen brackets (display brackets) which are permanently attached to the display hinges.

LCD screen inside display panel

TYPICAL LCD SCREEN RELATED FAILURES

On the following images you’ll see some typical LCD screen related failures.

1. You can see image only on a part of the LCD screen. For example, only the top side of the screen works properly.

Only part of screen works

2. There is one or more thin multi color lines running down the screen.

Vertical color lines on LCD screen

3. There is a wide band running down the LCD screen. The

Vertical band down LCD screen

BUYING A NEW REPLACEMENT SCREEN

The LCD screen is one of the most expensive parts in a laptop computer. If your screen is damaged and you decide to replace it yourself, you’ll have to make sure to purchase a new screen compatible with your laptop. Hear are a few things to consider before buying a new screen:

1. Screen size.
2. Some laptops come with full size LCDs. Some laptops come with widescreen LCDs.
3. LCD screen could be matte or glossy.
4. Same size LCD screens may have different resolutions.

The best way to find a new replacement screen would be using the manufacturer’s part number or LCD screen model. Both could be found on the back side of the screen.

 

135 Comments

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  1. 135
    Repair Man Says:

    @ Tego,

    Say the LCD part number is “ABC0123 V.4″ would an “ABC0123 V.1″
    be compatible ?

    Most likely yes but I would recommend contacting the seller before you buy a new screen.
    Once I purchased an “upgraded” version of screen and it had mounting brackets located in a different places. I had to return the screen and purchase exactly the same version.
    But in most cases newer versions are backward compatible. That’s I’m telling from my experience.

  2. 134
    Tego Says:

    Are different versions/revisions compatible within a series ?
    Say the LCD part number is “ABC0123 V.4″ would an “ABC0123 V.1″
    be compatible ?
    THX

  3. 133
    B.D Says:

    i have a problem about my laptop lcd screen the screen is ok when the lcd it not yet open completely ,when i open completely the screen turns to white

  4. 132
    Lois Says:

    Hopefully, I can post a question. We just finished reassembling our Presario V5303 laptop monitor. the screen had gone totally black, we replaced the inverter and the screen worked for 3 months then went black again. We took the monitor completely apart. First we discovered the wire from the inverter to the backlight had burned through. We replaced the backlight and the inverter. Put everything together. I will admit we did lots of handling of the disassembled monitor trying to get the backlight re installed.
    Now when I turn on the computer I get vertical lines of varing widths, some one inch, some pencil line thick. They are various colors and thats it. When I use an external monitor all works perfectly. Of course, that defeats the idea of portable laptop.

    What other things could be wrong, I will say the video cable was exposed for some time. Any assistance would be great.

  5. 131
    stacey Says:

    I just replaced the LCD screen on a Dell Mini 1018. worked at first except there was a rapid “flash” (like a camera flash). I shut the computer down and it went thru maybe 16 updates. Now the computer comes on, power and use light are on but there is NOTHING on the screen. HELP!

  6. 130
    krishika Says:

    some times my laptop screen turns into a black screen for few moments and comes to normal…. and says screen stopped responding… is there any problem with my screen?

  7. 129
    Ryan Says:

    Ryan here again, just a follow up post on some missing information. I have a HP Pavilion dv9700 laptop.

  8. 128
    Ryan Says:

    Hello, I recently started having problems with my laptop and believe the screen to be the issue. If the laptop is shut off, when it is next powered up, the screen will not show anything. I have done the flashlight test (to see if the backlight was out), but the screen appears totally blank. The computer will boot up without any issues, and works with an external monitor. Turning the laptop off and back on sometimes fixes this issue until the next time the laptop is shut off. Is this is an issue with my LCD screen or is it possible that it is the screen inverter or video cables? Is there anyway for me to test these to make sure they are not the issue?

  9. 127
    Misa Says:

    I have a green horizontal line running across the bottom of my screen above my task bar. It’ll show up for a second, disappear and then about two seconds later reappear.

  10. 126
    Repair Man Says:

    subin,

    Now i got a problem in my lap that is no display with power led flashing only… no beep and no display
    I hope u will respond with my this this complain and do the need full solution

    1. Remove the battery, unplug the AC adapter. Push on the power button for a few seconds. Now plug in the AC adapter and test again.
    2. If it doesn’t help, measure voltage on the AC adapter. Make sure the adapter outputs correct voltage.
    3. Try reconnecting memory modules. Try removing memory modules one by one.

    If nothing helps, probably this is motherboard failure.

  11. 125
    subin Says:

    Hai dear friend,
    your website very valid for me…so may i ask some questions of a laptop common problems??? i hope u will answer me the better solution..
    Now i got a problem in my lap that is no display with power led flashing only… no beep and no display
    I hope u will respond with my this this complain and do the need full solution
    THANKS AND REGARDS
    SUBIN

  12. 124
    Scott Says:

    I’ve got a Dell D620. My screen is jumping like one of the old high school film projectors and have lines going horizonal. Then it will stop for a while. This has been happening for a few days. Today the image started going multi-colored and blurring more. If I adjust the screen (opening & closing like), is sometimes helps, like a wire is not connecting right. Is this a screen issue or a video card? Or is could it be the wiring that is behind the screen? Thanks for your input…

  13. 123
    Bettina Says:

    Hello,

    After a long search in the net i found the picture 1 with the screen-prob. only question is now: it starts gradually fading until it looks like the picture. connected extern monitor and running on power-adaptor and strangely screen was completly like on extern monitor. it was faded after screensaver but came back to “full life” shortly.
    Is this now the LCD-screen or bad connection or not enough voltage coming to the screen? Before I decide to replace which ever failing part, it would be easier to know, what is the reason.

    Thank you!

  14. 122
    Repair Man Says:

    Kana,

    i noticed a few days ago that the right side of my LCD screen is brighter than the left side. There is not a big difference but i can still tell clearly if i concentrate. I bought my laptop only a month ago. Is this normal?

    No, it’s not normal. It’s possible the backlight lamp inside the screen is failing but I cannot tell for sure without looking at the laptop.
    Is it still under warranty? If it is, the laptop should be fixed under warranty.

  15. 121
    Kana Says:

    Hi, i noticed a few days ago that the right side of my LCD screen is brighter than the left side. There is not a big difference but i can still tell clearly if i concentrate. I bought my laptop only a month ago. Is this normal? How can i fix it?

  16. 120
    Dennis Collazo Says:

    I wanna say thanks to http://www.laptopparts101.com for this section on LCD screens and problems. I have a laptop and have a problem that it only shows the top part of the screen. I couldn’t figure out if it was the LCD ribbon cable, inverter, backlight or the actual screen. I looked all over the web for 2 days and ended up here, the only place with a pic of the actual problem i was having.Now i know i gotta get a new LCD screen and not waste money buying the cable, then the inverter and then the screen. Thank you guys.

  17. 119
    Repair Man Says:

    Chuck,

    I posted before about a problem with the screen of my HP 8510p. You said that it is an LCD failure and it needs to be replaced. The part number on the back of the LCD is B154SW01 V.1. I found that screen plus some others with the same part number but the version is different. I have seen up to V.9. Will this matter?

    It’s hard to tell. Most likely the screen will work just fine. I would suggest contacting the seller and ask this question.

  18. 118
    Chuck Says:

    Hi,

    I posted before about a problem with the screen of my HP 8510p. You said that it is an LCD failure and it needs to be replaced. The part number on the back of the LCD is B154SW01 V.1. I found that screen plus some others with the same part number but the version is different. I have seen up to V.9. Will this matter? Would it be better to get the higher version? Will it still work with my laptop or should I stick to getting the V.1. Are there different specs for V.1 or are all V.1 the same?

    Also, how hard is it to replace myself? I have a lot of experience with building and repairing desktops but have never worked on a laptop. It looks pretty straight forward. Is there anything I should be aware of or make sure I do/check when replacing the screen? Thanks in advance for your help.

  19. 117
    Repair Man Says:

    Ade,

    My Hpdv4 laptop has been frustrating me. It comes up with a white blank screen with pink like lines by the right side, while you could hear sounds that it’s booting fine. The the screen goes dark and keeps showing this ghost like white that keeps dimming. The frustrating part is I could switch it on the next day and it’s ok for a couple more days. Could this be the problem with the screen or something else.

    First, test your laptop with an external monitor. If external video works fine all the time and this problem appears only on the laptop screen, probably it’s bad screen.
    Also, could be faulty video cable but I think it’s the screen.

  20. 116
    Ade Says:

    My Hpdv4 laptop has been frustrating me. It comes up with a white blank screen with pink like lines by the right side, while you could hear sounds that it’s booting fine. The the screen goes dark and keeps showing this ghost like white that keeps dimming. The frustrating part is I could switch it on the next day and it’s ok for a couple more days. Could this be the problem with the screen or something else.

  21. 115
    Tinashe Says:

    my laptop was not displaying anything on the screen so i removed the keeboard and cover then i found out that there wer two loose cables from the screen ,but i cant find out wer the cables are clipped the motherboard. at the edge there are small clippers and its a toshiba

  22. 114
    Repair Man Says:

    Henry C,

    You haven’t covered the newer led screens?

    Not yet. Probably it’s time to update because many newer laptops come with LED screens now.

    I have an 15.6″ LED screen (ltn156at02) and it has one connector for the video signal only.

    Can I replace it with a 15.6 LED screen (ltn156at02-w01)that has two connectors?

    I would suggest replacing your failed screen with an exact one.
    Yesterday, one guy installed a “compatible” LED screen into a Sony laptop and apparently it fried the motherboard because the new screen has no light now. The original (cracked) LED screen had light.
    Again, I would go with an exact replacement screen.

  23. 113
    Henry C Says:

    Hi. It is great of you to provide this service.

    You haven’t covered the newer led screens?

    I have an 15.6″ LED screen (ltn156at02) and it has one connector for the video signal only.

    Can I replace it with a 15.6 LED screen (ltn156at02-w01)that has two connectors? There is a smaller white connector near the video signal connector. What is that for?

    Thanks for your help!

  24. 112
    Repair Man Says:

    mohsin akbar,

    i have dell inspiron 1420.Its screen is vibtaring countinuously,Its lcd is ok.Kindly tell me tha actual problem,is this problem is either LCD or LCD data strip.

    Test your laptop with an external monitor. Does the external image vibrate too or the problem appears only on the laptop screen?

  25. 111
    Repair Man Says:

    craig bird,

    im repairing a pc for a friend an the computer has a double screen , boots in double aswell, i want to keep repair cost to a min so i looked for an old inverter as i was sure if this was the cause

    Why do you think this is inverter related problem??? If the screen lights up, the inverter works properly, even if you have double screen.
    If the screen (backlight) lights up, the inverter works properly. Period!

    First of all, test your laptop with an external monitor. If image on the external monitor is normal and the problem appears only on the laptop screen, probably it’s bad screen.

    i replaced the inverter which never worked and then replaced the old inverter presuming id see double again, i never and i think its gone completely, what a mess!!

    Don’t panic. Make sure the old inverter connected properly.

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